Kodak Professional XTOL Film Developer (To Make 5L)

It depends on the size of the tank you are using to process your film and the format as to how many rolls can it process. The instructions on this link give you some information on a break down of that, https://bhpho.to/3QPtt0f.

yes, I do that all the time, for years, never had any issues. just make sure you have good scale to measure out the portions of powder correctly, and close the packets tight.

While dry powder has a long shelf life, I highly doubt that your 20 year old powder is any good.

Yes for b&w film developing.

I just finished processing for alternative printing four 8x10 Fuji Acos negatives using Kodak Xtol developer which I mixed yesterday using distilled water and all four were uniformly thin including the rebates notwithstanding that the time in the developer was 22.5 minutes. The negatives were shot with different lens on different days using a Sekonic L758-dr light meter to determine exposure. The Kodak catalogue number is 105 8338 with a manufacture date of 2019/08/09 and expiration date of 2022-08

It is the same developer as before. Kodak recently change their internal catalog number.

Mix the entire 5 liter batch as a stock solution. I mix it and store it at stock solution in four 1 liter bottles and 2 500ml bottles and then I can mix my 1:1 solution as needed. I find using the 2 500ml bottles makes things easier for storage and dilution. If you store it in one big bottle you would need to displace all the air in that bottle as you use the solution. Air permeates the developer and will ruin it. Quickly. Splitting the batch up into smaller quantites makes it easier to displace the air. After you pour your 1 liter solution into into the bottle you can displace any air by dropping a few marbles into the bottle so the solution has completely filled the bottle.

Yes. Kodak Professional XTOL Film Developer can be used with Fomafix.